21342044043 has 6 divisors (see below), whose sum is σ = 30827396964. Its totient is φ = 14228029356.

The previous prime is 21342044041. The next prime is 21342044083. The reversal of 21342044043 is 34044024312.

It is a happy number.

21342044043 is a `hidden beast` number, since 21 + 34 + 204 + 404 + 3 = 666.

It is not a de Polignac number, because 21342044043 - 2¹ = 21342044041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21342043998 and 21342044016.

It is not an unprimeable number, because it can be changed into a prime (21342044041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1185669105 + ... + 1185669122.

It is an arithmetic number, because the mean of its divisors is an integer number (5137899494).

Almost surely, 2^21342044043 is an apocalyptic number.

21342044043 is a deficient number, since it is larger than the sum of its proper divisors (9485352921).

21342044043 is a wasteful number, since it uses less digits than its factorization.

21342044043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371338233 (or 2371338230 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21342044043 its reverse (34044024312), we get a palindrome (55386068355).

The spelling of 21342044043 in words is "twenty-one billion, three hundred forty-two million, forty-four thousand, forty-three".